Improvement in feed-water heaters for steam-boilers



UNHED STATES PATENT EEicE.

W. V. MARTIN, OF ALLEGHENY, PENNSYLVANIA.

Specification forming part of Letters Patent No. 38,870, dated June 9,1863.

To all whom it' may concern:

Be it known that I, W. W. MARTIN, of Allegheny, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Supplying Boilers with Feed-Water; and I do herebydeclare the following to be a full, clear, and exact description of thesame, reference being had to the accompanying drawings, making a part ofthis specification, in which Figure I represents a vertical sectionthrough a pair of boilers and portions of the furnace, stand-pipe, Snc.Fig. 2 represents a transverse Vertical section taken at the red line a'a: of Fig. l, to show the arrangement of the inlet and heating pipes.

Similar letters of reference, Where they occur in the separate gures,denote like parts of the apparatus in both ofthe drawings.

I am aware that a feed-water pipe has been carried into or through thesteam-space in a boiler for the purpose of heating the supplywaterbefore it is delivered into the boiler; but this produces condensationinthe boilers, and is objectionable on this andother accounts.

I propose to heat the feed-water by the heat from the furnace withoutinterfering with the boilers in any manner; and my invention consists incarrying the feed-water through a vertical pipe located within anexterior vertical pipe, which is in direct contact with the furnaceheat, and thence heating and carrying the water to the boiler direct ina highlyheated condition, or to the mud and stand pipe, and thence tothe boiler, as may be preferred.

To enable others skilled in the art to make and use my invention, I willproceed to describe the same, with lreference to the drawings.

A represents a furnace, and B the boilers connected therewith. In thefurnace space C, between the boilers, I arrange a large vertical pipe,D, which should be of iron, as it is to resist high heat. This pipe Ipropose to connect with the standpipe E, as shown, and

from its top or upper portion a pipe, F, should lead into thesteam-space G of one or both of the boilers, to allow such steam as maygenerate in the pipe D to pass into the steamspace in the boiler orboilers. Within this vertical exterior pipe, D, there is placed a pipe,H, much smaller than the exterior one, and it may be made of copper. Thetop of this interior pipe, H, connects with a supply-pipe, I, that leadsto the pump or doctor, and a checkvalve, a, should be arranged in thissupplypipe, as shown at Fig. 2. The supply-water, being forced thro-ughthe pipe I, enters the pipe H, where it is partially heated, butimmediately after leaving the pipe H it passes in a thin film 'or columnthrough the outer pipe, D, which is in direct contact with the furnaceheat, and becomes highly heated therein, and may pass on into thestand-pipe E, and thence into the boilers; but, if preferred, and it isnot necessary to settle the feed-Water before it enters the boilers,then the supply-water may pass directly from the pipe H into the boileror boilers without taking it to the stand-pipe rst, and may enter theboiler or boilers at' any convenient point below the water-line. By thismeans I effectually heat the feed-water 'and introduce it thus heatedinto the boiler, which prevents condensation in the boiler, as must takeplace Where the supply-water is heated by the steam in the boiler beingintroduced therein in a cold state.

Having thus fully described the nature, ob-

ject, and purpose of my invention, what I claim is- Locating afeed-water pipe within an external vertical pipe arranged in thefurnace-space for the purpose of heating the Water that is to supplysteam-boilers, substantially in the manner herein described andrepresented.

. W. W. MARTIN. Witnesses:

G. W. REED,

ALEXANDER. HAYS.

